Description
Product Overview
SeamlessBio FBS Male is fetal bovine serum collected exclusively from male (XY) bovine fetuses, sourced from certified herds in the United States.
It provides a defined sex-hormone profile with elevated testosterone compared to mixed-gender or female FBS — removing a variable that is increasingly recognized as significant in cell biology, oncology, and metabolic research. Each batch is sterile filtered at 0.1 µm with full documentation. Learn more about what FBS is and how origin and sex influence cell culture results.
FBS Male (US Origin): Specifications
- Origin: United States — USDA-approved, traceable donor herds
- Donor sex: Male (XY) only — defined testosterone profile
- Filtration: 0.1 µm sterile filtered
- Sterility tested, mycoplasma tested
- EMEA-compliant documentation available
- Storage: –20 °C (cold chain required)
- Documentation: CoA, BSE/TSE statement, COO, sterility certificate available
Applications
- Sex-specific cell biology and oncology research
- Metabolic and hormonal studies where testosterone baseline matters
- Standardized cell culture requiring defined serum composition
- Reproductive biology and endocrinology research — see our full FBS portfolio
Available Formats
| Format | Size |
|---|---|
| Unit | 100 mL |
| 500 mL |
Key Benefits
Batch Reservation
Reserve validated lots up to 36 months for reproducible long-term workflows.
Full Documentation
CoA, BSE/TSE, sterility certificate — supplied by ISO 9001 and ISO 13485 certified partner facilities. Additional documents on request.
EU & Swiss Supply
Sourced from certified EU and Swiss partner facilities — fast delivery across EU, UK and Switzerland, full documentation included.
Frequently Asked Questions
Why does donor sex matter in FBS for cell culture?
Sex hormones — primarily testosterone, estrogen, and progesterone — are present in fetal bovine serum and can influence gene expression, proliferation rates, and metabolic activity of cultured cells. Standard FBS is collected from mixed-sex fetuses, introducing hormonal variability. FBS Male provides a consistently elevated testosterone profile, which is relevant for sex-specific biology studies, oncology models, and any research where hormonal background must be controlled.
How does US Origin FBS differ from South American or Australian FBS?
US origin FBS is collected under USDA-approved conditions with strong regulatory oversight and documentation (APHIS certification). It is EMEA-accepted and widely used in biopharmaceutical manufacturing. South American FBS offers a favorable cost profile; Australian FBS carries the lowest BSE risk as an OIE-certified BSE-free country. All three origins are scientifically equivalent for most applications — the choice is typically driven by regulatory requirements and budget.
Is FBS Male suitable for GMP or biopharmaceutical manufacturing?
FBS Male US Origin comes with full batch documentation from ISO 9001 and ISO 13485 certified partner facilities, including CoA, BSE/TSE statement, and Certificate of Origin. It is suitable for GMP-adjacent research and process development. For regulated manufacturing, we offer batch reservation up to 36 months and additional regulatory documentation on request.
Can I reserve a batch of FBS Male for long-term studies?
Yes — batch reservation is available for up to 36 months. Sex-defined FBS lots are particularly important to lock in for longitudinal or multi-site studies where hormonal consistency across the experiment is critical. Contact us with your required volume and timeline.
What documentation is included with FBS Male?
Every order includes a Certificate of Analysis (CoA). Additional documentation — BSE/TSE statement, USDA/APHIS certificate, Certificate of Origin (COO), sterility certificate, and mycoplasma test report — is available on request.
Request a Quote or Sample
48h response · EU & Swiss Supply · Batch reservation available · Full documentation
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